Model 1520

The Groth Model 1520 Air Operated Pressure/Vacuum Relief Valve with Pipe-Away Design is used to replace weight-loaded, spring-loaded, and pilot-operated valves in severe applications where polymerization and crystallization may take place and plug as well as corrode the control orifices. The air-operated valve increases valve efficiency and reduces evaporation losses. The pressure switch coupled with a solenoid valve and using plant instrument air instead of corrosive product vapor provides a bubble tight seal in the valve. Additionally, the use of clean air greatly reduces maintenance time when compared with the pilot-operated valve. By using the air-operated valve, remote sensing is provided by the pressure switch. This valve provides greater conservation due to minimum product loss which in turn adds to the profits at the bottom line.

Specifications

Size: 2" (DN 50) through 12" (DN 300)

Material: Available in carbon steel, fiberglass, and aluminum

Pressure: from 2.0* InWC to 15 psig

Vacuum: from 7.0 InWC to 12 psig

Features

AIR OPERATED• Use instrument air or N2• Non-corrosive and non-plugging• Lower profile and weight than spring operated models for high settings• Remote pilot sensing from pressure switch• Remote or manual blowdown available